<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    div {
        width: 300px;
        height: 100px;
        margin: 20px auto;
        text-align: center;
    }
    </style>
</head>
<body>
    <div id="title">标题</div>
    <div id="content">内容</div>
    <script src="./index.js"></script>
</body>
</html>